.app-index {
  background-color: #f5f6ff;
  min-height: 100vh;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  height: 100vh;

  .app-header {
    height: 64px;
    line-height: 64px;
    background-color: #001529;
    color: #fff;
    font-size: 18px;
    padding: 0 24px;
  }

  .app-sider {
    background-color: #f0f2f5;
    padding: 16px;
    overflow-y: auto;
  }

  .app-content {
    display: flex;
    flex: 1;
    background-color: #ffffff;
    overflow: hidden;

    .config-area {
      flex: 2;
      padding: 16px;
      border-right: 1px solid #f0f0f0;
      overflow-y: auto;
    }

    .preview-area {
      flex: 1;
      padding: 16px;
      overflow-y: auto;
    }
  }
}
